Insert fails when the count is less than three

Original Reporter info from Mantis: iskraelectrica

Reporter name: iskraelectrica (JLDC)

Description:

TMemo.Insert fails when the count is less than three

Steps to reproduce:

...
MemoURLs: TMemo;

...
       MemoURLs.Lines.Add('1');
       MemoURLs.Lines.Add('2');
       MemoURLs.Lines.Insert((MemoURLs.Lines.count-1),'3');

Mantis conversion info:

Mantis ID: 29670
OS: ubuntu
OS Build: 14.04.4 LTS, Tru
Platform: lunux
Version: 1.2.4
Fixed in revision: 51658 (#f9d4440d)